A clash of several national champions at the UCI Cyclo-cross World Championships was inevitable, but not like this.

Marion Norbert Riberolle, the Belgian champion, crashed on the slippery Hulst course with Kristyna Zemanovรก, the Czechia champion, late in the elite women’s race and Norbert Riberolle reacted by pushing her fellow competitor.

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Meanwhile, this was the first appearance in the elite Worlds division for 22-year-old Zemanovรก, who earned a silver medal last year in the U23 race. The Czechia rider had earned her first elite World Cup podium a week ago at Hoogerheide so was on form to compete for a medal.

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Jolanda Neff (Switzerland), Amandine Fouquenet (France) and Puck Pieterse (Netherlands) had cleared a wide corner when Zemanovรก appeared to slide into Norbert Riberolle, and the two went down, Kata Blanka Vas (Hungary) making a safe pass.

As Zemanovรก stood up and went to pick up her bike in the middle of the straightaway, Norbert Riberolle turned away from her bike and went straight for her competitor, boldly using both arms to shove her.